Overtake (ALTTTA)

The surge of euphoria the moment he grasped the winning trophy, followed by the secret routine that ensued. For popular racer Do Yeon-Ho, sex was merely a light after-party that followed a race. Just as he was about to get started with his usual light and passionate partner, Yeon-Ho was blocked by Kael, the little kid who had been annoyingly following him around since childhood. He had thought Kael looked quite cute since he had grown up so well, so he had planned to casually treat him for just one night...

"Do that kind of thing only with me."

Somehow, it seemed this guy never intended to stop at just one night from the start.

(Source: Lezhin, translated)